<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .box{
            border: 10px solid #eeeeee;
            border-top: 10px solid #35b1ff;
            width: 100px;
            height: 100px;
            margin: 10px auto;
            border-radius: 50%;
            animation: myfist 2s linear infinite;
        }
        @keyframes myfist {
            from{
                transform: rotate(0deg);
            }
            to{
                transform: rotate(360deg);
            }
        }
    </style>
</head>
<body>
<div class="box"></div>
</body>
</html>